Why would you think he will only get 10 years ?
from your link
18 December 2006: Yusuf Jama and Muzzaker Shah were sentenced to life imprisonment with a minimum term of 35 years.
A third man, Faisal Razzaq, a 25-year-old from London, was cleared of murder but found guilty of manslaughter. He was sentenced to life imprisonment with a minimum term of 11 years.
2 March 2007: A fourth man, Hassan Razzaq, the 26-year-old brother of Faisal was also convicted of manslaughter and sentenced to 20 years in prison.